TW8 TopBall High Load Standard type Self Aligning Ball Bushing NB Linear Systems Made in Japan TW8 1/2" Bore High Load Standard type TopBall inch type linear motion ball bushings/bearings, inner diameter(bore) is 1/2" inch dimensions with built-in seals, the Topball slide bush is a high performance bushing with three times the load capacity, capable of providing up to 27 times normal travel life of a conventional slide bushing. high accuracy grade linear bushings, series mainly used in the USA, NB brand (Nippon Bearing Linear Systems), made in Japan. * Item: TW8 Ball Bearing * Type: Linear Motion Ball Bushin * Ball circuit: 4 * Size: 1/2" x 7/8" x 1 1/4" inch * Inner Diameter: 1/2" inch * Outer Diameter: 7/8" inch * Length: 1 1/4" inch * Dynamic load rating: 1024 N * Static load rating: 1290 N * Quantity: One Bearing * Made in Japan